Section, Pub. L. 87–70, title VII, § 704, June 30, 1961, 75 Stat. 185; Pub. L. 89–117, title IX, § 909(d), Aug. 10, 1965, 79 Stat. 497; Pub. L. 90–19, § 18(c), May 25, 1967, 81 Stat 25; Pub. L. 91–609, title IV, § 401, Dec. 31, 1970, 84 Stat. 1782, related to conversion to other uses.